Table 2. Arrhenius Parameters for BA-a Monomer Showing the Effect of Purification^a.

	BA-a as obtained			BA-a recrystallized
heating rate (K min–1)	Ea (kJ mol–1)	n	m	Ea (kJ mol–1)	n	m
5	81.4	3.04	1.30	93.7	1.95	1.17
8		2.74	1.30		1.73	0.85
10		2.31	1.64		1.90	0.90
12		2.23	1.30		1.69	0.89
15		2.14	1.39		1.75	0.80

^aActivation energy E_a was calculated using the Kissinger method. An autocatalytic model was used to calculate values for n and m.